A cikin ka'idar kiɗa, rabin mataki yana nufin nisa ko tazara tsakanin bayanin kula guda biyu a ma'aunin chromatic. Musamman, rabin mataki shine mafi ƙarancin tazara tsakanin bayanin kula guda biyu a cikin kiɗan Yammacin Turai, wanda ya ƙunshi semitone ɗaya ko kashi ɗaya cikin goma na goma sha biyu. (ciki har da maɓallan baƙar fata) rabin mataki ne. Matsar daga farar maɓalli zuwa baƙar maɓalli, ko daga wannan baƙar maɓalli zuwa wani maɓalli na kusa, shima matakin rabin mataki ne. , kamar kunna bayanin kula kadan a waje don haifar da rashin fahimta ko tasiri mai bayyanawa.